Bio-Inspired Biomass-Derived Carbon Aerogels with Superior Mechanical Property for Oil–Water Separation

Chen, Tao; Li, Mingxin; Zhou, Li; Ding, Xin; Lin, Dongqing; Duan, Tao; Yang, Guangcheng; He, Rong

doi:10.1021/acssuschemeng.0c00910

Cited by 68 publications

(37 citation statements)

References 39 publications

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“…Like the emulsification properties, other researchers have exploited the fact that galactoglucomannan often carries associated lignin fragments, where the lignin component has been utilized as a crosslinker to enhance the properties of microfibrillated cellulose composite materials [ 156 ]. In addition to micro- and nanocellulose composites, glucomannan has been used as a component with graphene oxide to form interesting cryogels involving directional freezing and subsequent pyrolysis [ 157 ]. The cryogels had extremely high surface area and superior adsorption capacity for organic solvents and oils.…”

Section: Lignocellulosic Biomass Chemical Constituentsmentioning

confidence: 99%

Tailoring renewable materials via plant biotechnology

Vries

Guevara-Rozo

Cho

et al. 2021

Biotechnol Biofuels

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Plants inherently display a rich diversity in cell wall chemistry, as they synthesize an array of polysaccharides along with lignin, a polyphenolic that can vary dramatically in subunit composition and interunit linkage complexity. These same cell wall chemical constituents play essential roles in our society, having been isolated by a variety of evolving industrial processes and employed in the production of an array of commodity products to which humans are reliant. However, these polymers are inherently synthesized and intricately packaged into complex structures that facilitate plant survival and adaptation to local biogeoclimatic regions and stresses, not for ease of deconstruction and commercial product development. Herein, we describe evolving techniques and strategies for altering the metabolic pathways related to plant cell wall biosynthesis, and highlight the resulting impact on chemistry, architecture, and polymer interactions. Furthermore, this review illustrates how these unique targeted cell wall modifications could significantly extend the number, diversity, and value of products generated in existing and emerging biorefineries. These modifications can further target the ability for processing of engineered wood into advanced high performance materials. In doing so, we attempt to illuminate the complex connection on how polymer chemistry and structure can be tailored to advance renewable material applications, using all the chemical constituents of plant-derived biopolymers, including pectins, hemicelluloses, cellulose, and lignins.

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Section: Lignocellulosic Biomass Chemical Constituentsmentioning

confidence: 99%

Tailoring renewable materials via plant biotechnology

Vries

Guevara-Rozo

Cho

et al. 2021

Biotechnol Biofuels

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Section: Adsorption Techniques For Immiscible Viscous Crude Oil/water Mixture Separationmentioning

confidence: 99%

“…Inspired by the Thalia dealbata stem with a unique mineral bridge structure, Zhu et al. [ 46 ] designed an RGO‐KGM carbon aerogel with parallel stacked mineral bridge microscale structures (Figure 6e) prepared by the directional freezing of the RGO‐KGM suspension and carbonization in a tubular furnace. The unique mineral bridge structure not only provides greater space for oil absorption, but also maintains its original resilience after several compression cycles.…”

Section: Adsorption Techniques For Immiscible Viscous Crude Oil/water Mixture Separationmentioning

confidence: 99%

Advances of Adsorption and Filtration Techniques in Separating Highly Viscous Crude Oil/Water Mixtures

Cao

Pan

2021

Adv Materials Inter

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The efficient separation of highly viscous crude oil/water mixtures caused by offshore crude oil exploitation, marine transportation, and oil recovery is still a big challenge. Adsorption and filtration techniques are considered as powerful and renewable approaches for oil/water separation because of their low cost and simple operation. However, conventional adsorption and filtration materials show poor separation performance due to the extremely high viscosity of crude oil. A variety of advanced adsorption and filtration materials have been developed very recently for the improvement of the crude oil/water separation performance, such as oil adsorption materials with in situ thermogenesis and filtration membranes with self‐cleaning property. In this review, the background of crude oil and crude oil/water mixtures are first described. Then, the fundamental wetting theories are also presented. Furthermore, the state‐of‐the‐art materials for viscous crude oil/water separation based on adsorption and filtration techniques are summarized respectively, including the separation mechanisms, strategies, fabrication methods, and separation performance. Finally, the conclusions and challenges for the viscous crude oil/water mixture separation are discussed.

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“…Research on superhydrophobic [ 1 , 2 ], superoleophobic [ 3 , 4 ], superamphiphobic [ 4 , 5 , 6 , 7 ] and superoleophilic [ 8 , 9 , 10 ] surfaces has developed rapidly in recent years [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Meanwhile, an increasing number of applications for such surfaces, including self-cleaning [ 21 ], anti-fingerprint coatings [ 22 ], anti-fog coatings [ 23 ], microdroplet transfer technology [ 24 ] and oil–water separation [ 25 , 26 , 27 , 28 , 29 , 30 ], have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Micro/Nanoscale Structured Superhydrophilic and Underwater Superoleophobic Hybrid-Coated Mesh for High-Efficiency Oil/Water Separation

et al. 2020

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A novel micro/nanoscale rough structured superhydrophilic hybrid-coated mesh that shows underwater superoleophobic behavior is fabricated by spray casting or dipping nanoparticle–polymer suspensions on stainless steel mesh substrates. Water droplets can spread over the mesh completely; meanwhile, oil droplets can roll off the mesh at low tilt angles without any penetration. Besides overcoming the oil-fouling problem of many superhydrophilic coatings, this superhydrophilic and underwater superoleophobic mesh can be used to separate oil and water. The simple method used here to prepare the organic–inorganic hybrid coatings successfully produced controllable micro-nano binary roughness and also achieved a rough topography of micro-nano binary structure by controlling the content of inorganic particles. The mechanism of oil–water separation by the superhydrophilic and superoleophobic membrane is rationalized by considering capillary mechanics. Tetraethyl orathosilicate (TEOS) as a base was used to prepare the nano-SiO2 solution as a nano-dopant through a sol-gel process, while polyvinyl alcohol (PVA) was used as the film binder and glutaraldehyde as the cross-linking agent; the mixture was dip-coated on the surface of 300-mesh stainless steel mesh to form superhydrophilic and underwater superoleophobic film. Properties of nano-SiO2 represented by infrared spectroscopy and surface topography of the film observed under scanning electron microscope (SEM) indicated that the film surface had a coarse micro–nano binary structure; the effect of nano-SiO2 doping amount on the film’s surface topography and the effect of such surface topography on hydrophilicity of the film were studied; contact angle of water on such surface was tested as 0° by the surface contact angle tester and spread quickly; the underwater contact angle to oil was 158°, showing superhydrophilic and underwater superoleophobic properties. The effect of the dosing amount of cross-linking agent to the waterproof swelling property and the permeate flux of the film were studied; the oil–water separation effect of the film to oil–water suspension and oil–water emulsion was studied too, and in both cases the separation efficiency reached 99%, which finally reduced the oil content to be lower than 50 mg/L. The effect of filtration times to permeate flux was studied, and it was found that the more hydrophilic the film was, the stronger the stain resistance would be, and the permeate flux would gradually decrease along with the increase of filtration times.

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Bio-Inspired Biomass-Derived Carbon Aerogels with Superior Mechanical Property for Oil–Water Separation

Cited by 68 publications

References 39 publications

Tailoring renewable materials via plant biotechnology

Tailoring renewable materials via plant biotechnology

Advances of Adsorption and Filtration Techniques in Separating Highly Viscous Crude Oil/Water Mixtures

Micro/Nanoscale Structured Superhydrophilic and Underwater Superoleophobic Hybrid-Coated Mesh for High-Efficiency Oil/Water Separation

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